2023年第3期工程勘察GeotechnicalInvestigation&Surveying73地空时频域电磁法对隧道岩溶的探测分析单玉孟1,史永杰2,严绍明1,魏海民∗2,袁刚1(1.云南临云高速公路有限公司,云南临沧675800;2.云南航天工程物探检测股份有限公司,昆明650217)摘要:随着我国西南交通建设的快速推进,为保障隧道建设期安全,针对隧道不良地质的勘察意义重大,而地面勘察技术手段受地形等影响,工作效率低,局部区域难以开展。鉴于此,针对云南省某公路隧道开展了水文地质调查、地球物理特征统计及地空时频域电磁探测,查明了隧道沿线的不良地质段、设计轴线周围的岩溶或富水区的空间分布形态,为隧道施工安全与整治提供了依据。该方法的成功应用,可为国内碳酸盐岩地区的隧道岩溶勘察提供一种可借鉴的技术手段,同时可推广到工程建设与矿产勘查等领域,预期可取得较好的应用效果。关键词:不良地质;地空时频域电磁法;岩溶勘察;隧道建设中图分类号:P631.3文献标识码:ADetectionandanalysisoftunnelkarstbyground-airbornetime-frequencyelectromagneticmethodShanYumeng1,ShiYongjie2,YanShaoming1,WeiHaimin∗2,YuanGang1(1.YunnanLinyunExpresswayCo.,Ltd,Lincang675800,China;2.YunnanAerospaceEngineeringGeophysicalProspectingCo.,Ltd,Kunming650217,China)Abstract:WiththerapiddevelopmentoftransportationconstructioninsouthwestChina,inordertoensurethetunnelconstructionsafety,itissignificanttoinvestigatetheadversegeologyofthetunnel.However,groundsurveyisaffectedbythetopography,andtheworkefficiencyislow,anditissometimesdifficulttocarryoutinsomeareas.Hydrogeologicalsurvey,geophysicalcharacteristicsstatisticsandground-airbornetime-frequencyelectromagneticdetectionwascarriedoutalongthehighwaytunnelinYunnanProvincetoinvestigatetheadversegeologicalsections,andthespatialdistributionpatternsofkarstorwater-richareasaroundthetunneldesignaxis,whichprovidedabasisforthetunnelconstructionsafety.ThesuccessfulapplicationofthismethodcouldprovideareferabletechnicalmeansfortunnelkarstexplorationincarbonaterockareasinChinaandcouldbeextendedtoengineeringconstructionandmineralexploration.Keywords:adversegeology;ground-airbornetime-frequencyelectromagneticmethod;karstexploration;tunnelconstruction收稿日期:2022-05-...
